Gemstone



FIG. 1 is a top plan view of a gemstone showing our new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a perspective view thereof;

FIG. 4 is a side elevational view thereof; and,

FIG. 5 is a further side elevational view thereof as viewed from a corner of the gemstone. 

The ornamental design for gemstone, as shown and described. 